flush joint短语¹⁴⁴⁹⁷²⁺² 基本例句 adj.平接式的 This paper presents flush joint casing classification, structural feature, technical difficulty in design, performance and evaluation, main advantages and application. 文中介绍了无接箍式套管的分类、结构特征、设计的技术难点、性能和评价方法、主要优点和应用情况。 cnki